Comparative distributions of size fractionated metals in pore waters sampled by in situ dialysis and whole-core sediment squeezing: Implications for diffusive flux calculations

Autor:	A. Russell Flegal, Miguel Angel Huerta-Diaz, Ignacio Rivera-Duarte, Sergio A. Sañudo-Wilhelmy
Rok vydání:	2007
Předmět:	In situ Sediment Fraction (chemistry) Pollution law.invention Ammonia chemistry.chemical_compound Pore water pressure Membrane chemistry Geochemistry and Petrology law Environmental chemistry Environmental Chemistry Dialysis (biochemistry) Filtration
Zdroj:	Applied Geochemistry. 22:2509-2525
ISSN:	0883-2927
DOI:	10.1016/j.apgeochem.2007.07.001
Popis:	Trace elements (Ag, Cd, Co, Cr, Cu, Fe, Mn, Pb, V, Zn) and ammonia were measured in pore waters extracted from sediments collected in Green Sands Beach (Mare Island, San Francisco, CA) using peepers and whole-core squeezers. Samples were size-fractionated, either by using 0.45 and 0.1 μm polycarbonate filters (whole-core squeezers), or by passive filtration using peepers with 0.45 μm and 3000 MWCO (3 kDa) membranes. Results indicate that the distribution profiles of pore water constituents in the traditionally defined total dissolved fraction (CTD = NH 4 + were similar to the ones obtained for CTD. Profiles for the small-sized dissolved fraction (CSSD =
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3cb686e66ba723c0414f0225defcda51 https://doi.org/10.1016/j.apgeochem.2007.07.001 Zobrazit plný text záznamu Full Text from ScienceDirect